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The resistance of a nichrome wire at 0^(@)C is 10Omega. If its temperature coefficient of resistance is 0.004//^(@)C find its resistance at boiling point of water. Comment on the result. |
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Answer» Solution :RESISTANCE of a nichrome wire at `0^(@)C, R_(0)=10OMEGA` Temperature co-efficient of resistance, `alpha=0.004//^(@)C` Resistance at boiling POINT of water, `R_(T)=?` Temperature of boiling point of water, `T=100^(@)C` `R_(T)=R_(0)(1+alphaT)=10[1+(0.004xx100)]` `R_(T)=10(1+0.4)=10xx1.4` `R_(T)=14Omega` As the temperature increases the resistance of the wire also increases. |
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